I'm having the exact same issue running running Python 2.7.9 and trying to display a frame from the Pi Camera module. II am running virtually the same code as you that I found https://www.pyimagesearch.com/2015/03/3 ... nd-python/ . I get the PiCameraResolutionRounded warning and a blank gray image frame. Interestingly, there is no value I can set the camera resolution to to avoid the PiCameraResolutionRounded warning.